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JOURNALS // Teplofizika vysokikh temperatur // Archive

TVT, 1991 Volume 29, Issue 2, Pages 261–267 (Mi tvt3924)

Thermophysical Properties of Materials

Spectrum of collective excitations in liquid metals

A. M. Belyaev, V. B. Bobrov, S. A. Triger

Institute for High Temperatures, USSR Academy of Sciences

Abstract: The delayed ionic density–density Green's function and dielectric permittivity of simple liquid metals are considered in terms of the pseudopotential of electron–ion interaction. This approach is used to study the spectrum of collective excitations $\omega(k)$ and its position with respect to the maximum of the ionic dynamic structural factor. Numerical calculation for liquid rubidium shows r that the excitation is well determined in the region $k \lesssim 1$ Å$^{-1}$ where there is f deviation from the acoustic dispersion curve.

UDC: 532.591

Received: 26.04.1990


 English version:
High Temperature, 1991, 29:2, 196–201

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© Steklov Math. Inst. of RAS, 2025